batgrbproduct Analysis for Trigger=153987
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
- 3) This page will be updated for up to 8 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.41
Process Start Time (local time): Tue Jan 8 19:59:26 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger153987/GCN5_download_cron
======================================================================
Trigger: 00153987 Segment: 000
BAT Trigger Time: 147778576 [s; MET]
Trigger Stop: 147778896 [s; MET]
UTC: 2005-09-07T09:36:16.284220 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 247.953791995516 Dec: -48.8153097642638 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 34154
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 34154
Flight Position: [ source = BAT ]
RA: 247.953791995516 Dec: -48.8153097642638 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 247.953791567261 Dec: -48.8153100872568 [deg; J2000]
{ 16h 31m 48.9s , -48d 48' 55.1" }
+/- inf [arcmin] (estimated 90% radius based on SNR)
+/- 1.10423522716678e-39 [arcmin] (formal 1-sigma fit error)
SNR: 0
RA = 16h 31m 48.9s (247.953792 deg.)
Dec = -48d 48' 55" (-48.815310 deg.)
Angular difference between Flight and Ground position is 0.000026 arcmin
Partial Coding Fraction: 0.9609375 [ including projection effects ]
Duration
T90: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
T50: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 320 second)
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.000000 0.000000 0.000000 0.000000
0.000000 0.000000 0.000000 0.000000 [error]
Peak 0.000000 0.000000 0.000000 0.000000
0.000000 0.000000 0.000000 0.000000 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
=== Fluence/Peak Flux Summary ===
Model Band1 Band2 Band3 Band4 Band5 Total
15-25 25-50 50-100 100-350 15-150 15-350 keV
Fluence Power-law 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 4.84e-07 7.07e-07 2.01e-06 1.17e-04 6.66e-06 1.18e-04 erg/cm2
Peak flux Power-law 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 4.90e-01 3.71e-01 5.04e-01 8.47e+00 1.36e+00 8.80e+00 ph/cm2/s
Fluence Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 5.21e-07 9.92e-07 2.27e-06 1.33e-04 6.71e-06 1.34e-04 erg/cm2
Peak flux Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 4.95e-01 5.16e-01 5.90e-01 9.50e+00 1.36e+00 1.71e+00 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 5.05e-07 9.91e-07 2.57e-06 5.11e-05 7.60e-06 3.30e-04 erg/cm2
Peak flux Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 4.49e-01 4.76e-01 5.77e-01 3.26e+01 1.31e+00 1.82e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.500 6.500 - - 0.00e+00 1.13e-02 0.000 57
CPL 1.000 2.854 50.0 5000.0 0.00e+00 2.19e+01 0.000 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.500 6.500 - - 0.00e+00 1.13e-02 0.000 57
CPL 1.000 2.923 50.0 5000.0 0.00e+00 2.19e+01 0.000 56
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err : 90% error of the photon index
Epeak : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedom
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
T90 in the 50-300 keV band: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 320.000 0.000 320.000
T90 320.000 0.000 320.000
T50 320.000 0.000 320.000
Peak 320.000 0.000 320.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
247.9538 -48.8153 45.0000 19.5 165.7 0.0000 0.0 TRIG_00153987
------------------------------------------
Foreground time interval of the image:
0.000 33.069 (delta_t = 33.069 [sec])
Background time interval of the image:
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
- 4) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
- 5) Time of each bin is in the middle of the bin.
1 s binning
From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval
64 ms binning
Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec
16 ms binning
From T100_start-5 s to T100_start+5 s
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
- 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 33.069 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -4.50000 8.50000 )
Norm@50keV : 0.00000 ( 0.00000 2.267602E-02) )
------------------------------------------------------------
Chi-Squared = 0.000000 using 59 PHA bins.
Reduced chi-squared = 0.000000 for 57 degrees of freedom
Null hypothesis probability = 1.00
Photon flux (15-150 keV) in 33.07 sec: 0.00000 ( 0 2.72268 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 1.33285e-05 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 33.069 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( -4.00000 1.70835 )
Epeak [keV] : 50.0000 ( -49.9900 9950.00 )
Norm@50keV : 0.00000 ( 0.00000 43.8882 )
------------------------------------------------------------
Chi-Squared = 0.000000 using 59 PHA bins.
Reduced chi-squared = 0.000000 for 56 degrees of freedom
Null hypothesis probability = 1.00
Photon flux (15-150 keV) in 33.07 sec: 0.00000 ( 0 2.72283 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 1.34184e-05 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 33.069 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.983950 ( -9.01605 5.98395 )
beta : -2.50000 ( -7.50000 12.5000 )
Epeak [keV] : 80.0000 ( -79.9000 9920.00 )
Norm@50keV : 0.00000 ( 0.00000 1.770915E+07) )
------------------------------------------------------------
Chi-Squared = 0.000000 using 59 PHA bins.
Reduced chi-squared = 0.000000 for 55 degrees of freedom
Null hypothesis probability = 1.00
Photon flux (15-150 keV) in 33.07 sec: 0.00000 ( 0 2.62307 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 1.51936e-05 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 33.069 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -4.50000 8.50000 )
Norm@50keV : 0.00000 ( 0.00000 2.267602E-02) )
------------------------------------------------------------
Chi-Squared = 0.000000 using 59 PHA bins.
Reduced chi-squared = 0.000000 for 57 degrees of freedom
Null hypothesis probability = 1.00
Photon flux (15-150 keV) in 33.07 sec: 0.00000 ( 0 2.72268 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 1.33285e-05 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 33.069 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( -4.00000 1.84584 )
Epeak [keV] : 50.0000 ( -49.9900 9950.00 )
Norm@50keV : 0.00000 ( 0.00000 43.8882 )
------------------------------------------------------------
Chi-Squared = 0.000000 using 59 PHA bins.
Reduced chi-squared = 0.000000 for 56 degrees of freedom
Null hypothesis probability = 1.00
Photon flux (15-150 keV) in 33.07 sec: 0.00000 ( 0 2.72283 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 1.34184e-05 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 33.069 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.983950 ( -9.01605 5.98395 )
beta : -2.50000 ( -7.50000 12.5000 )
Epeak [keV] : 80.0000 ( -79.9000 9920.00 )
Norm@50keV : 0.00000 ( 0.00000 1.770915E+07) )
------------------------------------------------------------
Chi-Squared = 0.000000 using 59 PHA bins.
Reduced chi-squared = 0.000000 for 55 degrees of freedom
Null hypothesis probability = 1.00
Photon flux (15-150 keV) in 33.07 sec: 0.00000 ( 0 2.62307 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 1.51936e-05 ) ergs/cm2
Plot creation:
Tue Jan 8 20:03:30 EST 2008